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Finding the Fourth Proportional to 67,724.91, 101,639.21 and 30,270.51

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Solution

The fourth proportional to 67,724.91, 101,639.21 and 30,270.51 is: 45,428.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,724.91 : 101,639.21 = 30,270.51 : x
  2. Step 2: Convert to fraction form
    67,724.91/101,639.21 = 30,270.51/x
  3. Step 3: Cross multiply
    67,724.91x = 101,639.21 × 30,270.51
  4. Step 4: Simplify right side
    67,724.91x = 3,076,670,571.34
  5. Step 5: Solve for x
    x = 3,076,670,571.34/67,724.91
  6. Step 6: Final answer
    x = 45,428.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.